Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan van 10 slippers" » "pham van 10 slippers", "thanh van 10 slippers", "luan van 10 slippers", "phan van 10 slippery", "phan van 10 grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("phan van 10 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan van 10 slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan van 10 slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan van 10 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.